include/nucleus/bufd.h File Reference

Detailed Description

Note:: Copyright (C) 2009 Philippe Gerum <rpm@xenomai.org>.

Xenomai is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

Xenomai is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with Xenomai; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

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Functions

static void xnbufd_map_uread (struct xnbufd *bufd, const void __user *ptr, size_t len)

Initialize a buffer descriptor for reading from user memory.

static void xnbufd_map_uwrite (struct xnbufd *bufd, void __user *ptr, size_t len)

Initialize a buffer descriptor for writing to user memory.

ssize_t xnbufd_unmap_uread (struct xnbufd *bufd)

Finalize a buffer descriptor obtained from xnbufd_map_uread().

ssize_t xnbufd_unmap_uwrite (struct xnbufd *bufd)

Finalize a buffer descriptor obtained from xnbufd_map_uwrite().

static void xnbufd_map_kread (struct xnbufd *bufd, const void *ptr, size_t len)

Initialize a buffer descriptor for reading from kernel memory.

static void xnbufd_map_kwrite (struct xnbufd *bufd, void *ptr, size_t len)

Initialize a buffer descriptor for writing to kernel memory.

ssize_t xnbufd_unmap_kread (struct xnbufd *bufd)

Finalize a buffer descriptor obtained from xnbufd_map_kread().

ssize_t xnbufd_unmap_kwrite (struct xnbufd *bufd)

Finalize a buffer descriptor obtained from xnbufd_map_kwrite().

ssize_t xnbufd_copy_to_kmem (void *ptr, struct xnbufd *bufd, size_t len)

Copy memory covered by a buffer descriptor to kernel memory.

ssize_t xnbufd_copy_from_kmem (struct xnbufd *bufd, void *from, size_t len)

Copy kernel memory to the area covered by a buffer descriptor.

void xnbufd_invalidate (struct xnbufd *bufd)

Invalidate a buffer descriptor.


Functions
static void	xnbufd_map_uread (struct xnbufd bufd, const void __user ptr, size_t len)
	Initialize a buffer descriptor for reading from user memory.
static void	xnbufd_map_uwrite (struct xnbufd bufd, void __user ptr, size_t len)
	Initialize a buffer descriptor for writing to user memory.
ssize_t	xnbufd_unmap_uread (struct xnbufd *bufd)
	Finalize a buffer descriptor obtained from xnbufd_map_uread().
ssize_t	xnbufd_unmap_uwrite (struct xnbufd *bufd)
	Finalize a buffer descriptor obtained from xnbufd_map_uwrite().
static void	xnbufd_map_kread (struct xnbufd bufd, const void ptr, size_t len)
	Initialize a buffer descriptor for reading from kernel memory.
static void	xnbufd_map_kwrite (struct xnbufd bufd, void ptr, size_t len)
	Initialize a buffer descriptor for writing to kernel memory.
ssize_t	xnbufd_unmap_kread (struct xnbufd *bufd)
	Finalize a buffer descriptor obtained from xnbufd_map_kread().
ssize_t	xnbufd_unmap_kwrite (struct xnbufd *bufd)
	Finalize a buffer descriptor obtained from xnbufd_map_kwrite().
ssize_t	xnbufd_copy_to_kmem (void ptr, struct xnbufd bufd, size_t len)
	Copy memory covered by a buffer descriptor to kernel memory.
ssize_t	xnbufd_copy_from_kmem (struct xnbufd bufd, void from, size_t len)
	Copy kernel memory to the area covered by a buffer descriptor.
void	xnbufd_invalidate (struct xnbufd *bufd)
	Invalidate a buffer descriptor.